Long-stroke lift for pumping wells



A rilfi 1926. A. c. TUNISON LONG STROKE LIFT FOR PUMPING WELLS Filed May 11h 1925 2 Sheets-Sheet l April 6 1926.

A. C. TUNISON LONG STROKE LIFT FOR PUMPING Filed May 11 1925 6'0 E i I l i i m 73 I I If 3 'I' u i z, 1':

' 72 44' M 4? 7 43 I v f" 1" 31 20 z y if 32 39 g 2 Sheets-Sheet 2 Who z fldTumlron Patented Apr. 6, 1925! UNITED STATES PATE T OFFICE;

ARTHUR o. TUNIsoN, or Los ANeRLRs, CALIFORNIA, AssIeNoRTo BAKER CASING V SHOE COMPANY, or COALINGA, CALIFORNIA, ,A CORPORATION or CALIFORNIA.

Lo re-STROK LIFT Ro PUMPING wRLLs.

Application filed my 11, 1925. 'Serial No. 29,544.

' To all whom it may concern:

Be it known that I, ARTHUR C. TUNIsoN, a citizen of the United States,.residing at Los Angeles, in the county of Los Angeles tain new and useful Improvementsin Longolear, and exact descriptionof the invention, such as will enable others skilled in the art to which appertains to make and use the 2 it is transferred from the lift mechanism at the top of the well to the pump at the bot-v tom of a deep well,agreat part of the length of the stroke is lost.

25 Itlis an object of the'invention to increase the stretch will not be detrimental tothe pumpingloperation and to the actual out-put 'with the movable rack bars and with the of the .well. A

Another object of the invention-isto -pr i 30 vide a compact mechanism suitable for construction at the top'of a well, and in which I the additional stroke length may be accomrespect to theomovable rack bars, and such stationary rack bars are suitably braced by plished without the application of further 3 power orfurther operating expense.

Figure 1 is a side viewvwith parts shown in section of an improved lift mechanism constructed accord ng to the present invention, 4

7 Figure 2 is a front view withpartsalsoi shown in section, and I I O the line 33 in Figure 2.

Referring more particularly to the'drawtugs 3designates the well casing and-4 the rods extending fromrlthe lift mechanism n ws tothepump atthe bgtton of the well,

the stroke or the travel of the rods, so "that With the foregoing andfother objects in parts through Figure 3 is a horizontal section taken on I At 5 is indicated a platformon which are laid the beams'fi and 7 at opposite sides of the well shaft,,these beams receiving the tracks 8 and 9 upon which the flanged roll 5 and State of California, have invented cerp p p to roll. Stroke Lifts for Pumping ells; and I do A herebydeclare the following to be a full,

ers 10 and 11 of the carriage 12 are adapted l The carriage is constructed in any suitable manner as for instance in part by the,

"direction with their flanges turned away from each other. The flanges providev for receiving the bearings 16 and 17 for the flanged wheels 10 and 11; I

The beams 12, 13 and 14, receive the pairs of rollers 18 and 19, these rollers being disposed upon opposite sides of the guides 20 and 21 for the movable rack bars 22 and 23 which may extend in one piece with the guides 20 and 21; the guides and the movable rack bars being arranged to movesubstantially vertically. The pumprod extends up through the casing 3, and is secured to a cross head24 connecting the upper ends o-f'the two movable rack bars 22 and 23. Traveling pinions 25' mesh both stationary rack bars 26 and 27 disposed opposite the movable rack bars. The stationary rack bars are erected on the carriage or truck in parallel and spaced relation with ing rods or pitman rods 31 and 32, the lower ends of which are adapted to be driven from the gearwheels 33 and 34 to which said con- 3 v necting rods are secured by the pins. I In Figure 1,four pins 35, 36, 37 and 38 are shown all as located at progressively greater distances from the center of rotation of the gear wheels whereby the, stroke of the connecting rods may be varied at will by selecting an appropriate pin. Thegear wheels 33 and 34 are mounted on the shaft'39 and said gear wheels are disposedinmesh with pinions 40driven by the belt 41 from an appropriate source of power. through the pulley 42 associatedwith said gear wheels 40. I g r 3 the s ationary rack bars 26 and 27 are shown as attached to the outer side of the near flanges and 61 of the I beams 62f and 65; while the opposed flanges 62 and 63 provide guide ways for the rollers 66 and 67 journaled upon shafts 6S and 69 whiohare carried 'in' the rear arms 70 and 71. These arms are arranged upon the sleeve 72 which fits loosely over the shaft 30 between the pinions and between'the thrust rollers 73 and 7% which are mounted on the shaft 30 and travel up and down opposite the guide rolls 66 and 67 upon the flanges 62 and 6 of h I b ams- :The u d beams 20 @121 to which the: movable rack bars 2 n 23 ar ttadmd are a so P efe a ly,

'iueh 1 b n c ss ily, of am construe.

t ion, and they receive upon their outer sides the guide rollers 44 carried upon the arms l3 Pr ject g 'fei'v'ard 'yfwmith sle ve 7 and being curved about the thrust rollers.

' The guide rollers a l are in alineinent with t e We ra k d h i nlhi l'v i le th guide llerf '6 an '6 e in fel nem t-vith the thrust r rs 5- As show in F g e 1 the m h de TQ QI .66 and 67 are preferably mounted in pairs one above the other in the arms 70 and 71, while the forward guide'rollers 4A are single rollers. The double rollers in the rear will prevent any oc ing iiie en iit f he" sleev in a v t ca pl s such a may ca se dis inement or binding of the parts, There willalw y e f edom f m veme t betw n the pinion teeth and the teetl 'of the rack bars.

In the use ofthedevice, the belt arrangement ll will drive the pinions 40 andin. t i m n er th gear Whe l 3 andfid will be e C y ng mend ther w th con necting rods 31 and 32 an d causing the shaft '30 and the traveling pinions 25 to'be alternately lifted and lowered. The pinions will r m up d do n the s ati nary rack bar 26 and 27 and will, in a well understood manner, lift and lower the movable rack bars 22 and 23 through a very long stroke. The pump rod be ngficarried with the movable rack bars will thus be lifted andlowered and given an extremely long stroke to take up the stretch in the pump rod. The crank throws may be v ried by nser -ins the P n 35, 36, 3,7 and'88 in the various holes in the disc gears '33 and 3 4; The movable racks are 'liftednotonly by the force" of theH Qhnects iii' ds a d. kbef also by h m 11g 6 the n ons 2 T e travel of the move bl is a subst nti lly d ub ed e s e n the s ft 30 i'sishbini i Figure 'eh hs sea ate f om the uid Toner arins,' b iit*the"t 'o 11y also be made f eh Pi rs .a qhedtqs eh 1s ou th t ra idu bhange an modifications maybe inade in thefdetails ef'se ieq o and de i n f he above se i y e crib elhbedii ieht' of this in- ,Yli awiilanf'i p nitg' free; spiritthereof, such changes and modifications being restricted only by the scope of the following claims.

lVhat is claimed is v 1. A long stroke lift mechanism for wells comprising a -frame, stationary rack'loars on said frame, movable rack bars opposite said stationary rack bars, pinions meshing with said rack'bars, a shaft passing through said pinions, means ,to move said shaft back and forth, thrust rollers on said shaft, guides for engaging said thrust rollers, and guide means carried by said shaft andengaging said guide means at opposite sides of said thrust rollers.

2'. A long stroke lift mechanism for wells .comprising'a fran ie, stationary rack bars on saidifraine, movable rack bars opposite said stationary rack bars, pinionS DwShing ,With sa d rackha 's, haf pass ng through sa pinions, means to nove said shaft back and forth, thrnst rollers .on said shaft, guides for engaging said thrust rollers, guidemeans carr ed by said haft and engaging said gu de 1116, 1 5 a opposite sides of said'thrust ro l s, and smile means carr e by Said shaft and engaging against the outer sides 1" said mova le racks 8. A longstroke lift mechanism for wells comprising a frame, I beams installed on said frame, stationary rack bars secured to the outer parts of the flanges at one side of said beams, movable M91: bars disposed opposite said stationary rack bars, guide bsa-m arrying aidmova rack bar p ions disposedin mesh with both said rack a s, a s atft pass ng thr ugh s d pi ons m an tomove said shaft b ck and f h, a sleeve on said shaft between said pinions, thrust rollers on the shaft between the sleeve and pinions nd ngaging ga n t t inner p tions o he fla ges of the I b m jacent'the portions to which said rack bars are attached, rearwardly projecting arms on said sleeve, .pairspf guide rolls carried by said arm and movable against the portions compr ses a frame, subst n ially v rtic l stationarymack bars installed on said frame, movable racl; bars disposed opposite said stationary rack bars, pinion m hing with said movable and S ationery ack ars and couple together, means for-lifting and lOwfi ling said'pin ons, means in the fr me f r guiding the inov'ements'of said rack bars the r lower nort ons n means raise and lowered with said pinionsand engaging both sa r c ba s fervg'uid ns the m m n of he ne bie ee i s a. heir upp r p rt ens.

has sears sedans-1. emit comprising a frame, fixed and movable rack bars thereon, said movable rack bars being connected to the pump rod, pinions between said rack bars,-connecting rods for lifting and lowering said pinions, means for guiding the movements of said movable rack bars, disc gears having openings at various distances from the center of rotation thereof, and pins to selectively fit, in said openings for coupling the connecting rods to said disc gears, and means to rotate said disc gears.

6. A long stroke lift mechanism for wells comprising a car'iage having pairs of spaced beams, stationary rack bars erected on said carriage, movable rack bais sliding between said pairs of beams, guide means carried by said pairs of beams between the same for guiding the movements of the lower )ortions of said movable racks inbars.

ions disposed in mesh with the racks, ashaft sliding through said carriage, pinions in 3 mesh with said movable and stationary rack I bars, means for lifting and lowering said pinlons, a shroud carried by said pinions and movable therewith, rollers journaled in said shroud and engaging the outside surface of said movable rack bars, and other rollers carried by said shroud for engaging the inside surface of said stationary rack ARTHUR- o. TUNISON. 

